Governor



(No Mode 1.)

5 SheetsSheet 1.

W. D. MARKS.

GOVERNOR.

No. 350,595. Patented Oct. 12, 1886.

INVENTOR N. PITERS. Plwwuxho n hu (No Model.) 5 Sheets-Sheet 2.

W'. D. MARKS.

GOVERNOR.

No. 350595. Patented Oct. 12,1886;

l; G l J INVENTOR (N0 Model.)

5 Sheets-Sheet 3. W. D. MARKS.

GOVERNOR.

No. 350,595. Patented but. 12, 1886.

INVENTOR (NoModelJ 5S heets-Sheet 4.

W. D. MARKS.

GOVERNOR.

No. 350,595. Patented Oct. 12, 1886.

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5 sheets-sheet 5.

(N0 Model.)

W. 'D. MARKS.

GOVERNOR.

Patented Oct. 12, 1886.

Nor 350,595.

INVENTOR j g. J.

' and to the nut K at c c.

UNITED STATES PAT NT rFicE.

WILLIAM D. MARKS, OF PHILADELPHIA, PENNSYLVANIA.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 350,595, dated October 12, 1886.

Application filed April 9, 1886. Serial No.198,397. (No model.)

To all whom it may concern:

Be it known that I, W LLIAM D. llIARKS, a citizen of the United States, and a resident of the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Governors, of which the following is a specification.

The object of my invention is to cause in a steam-engine governor a movement of the valve before any change of speed occurs in the governor-balls. This is accomplished by the inertia and the centrifugal force of the balls cojointly. This was attempted in my patent of June 22, 1875, No. 164,745, by means of in ertia alone, but did not prove effectual because too sensitive, and because it would not allow of a large range of adjustment. The larger adjustment of the valves position, or of other attachment to the governor, is made by means of the centrifugal force, while the adjustment for sudden changes of speed in "the engine, or for slight and temporary variations, is effected by means ofthe inertia of the balls in advance of any change of speed in their Q revolution.

. In the accompanying drawings, forming part of this specification, and in which similar let: ters of reference indicate similar parts throughout the several' views, Figure 1 is a central sectional elevation of my invention, and Figs. 2, 3, 4, and 5 sectional elevations of modifications of the same.

The balls B B are secured to thelower ends of arms R R, the upper ends of which are pivoted to the upper end of spindle G at A. The links L L are pivoted to the arms R R at a The distance from center of balls B to center of pivot A is bisected, and this halt-length is made equal to the length of the links L L. As the point-A is free to rise and fall vertically, and the points 0 c are relatively fixed, the balls move out in a straight line, thus eliminating the force of gravitation in their action, and the balls revolve in a givenhorizontal plane which passes through the points 0 c in all positions and at all speeds, their tendency to move outward being restricted by the spiral spring E, and the spindle G, playing freely up and down, makes the large adjustment of the valves position by means of centrifugal force alone. The nut K has a female thread cut in it, and an arm, D, projecting from it. The prolonged hub H of the upper miter-wheel, b, has a projecting arm, D, and a male thread, M, entering the nut K. The arms D D are joined by means of the spiral spring F, and the power to turn the governorballs is transmitted through miter-wheels c and b to arm D, to spring F,

and by this spring to the arm D. Should the engine attempt to go faster, the spring F will close in proportion to its sensitiveness, because of the inertia of the balls, and thus screw down the-nut K and lower the point A, thus closing the valves. Should the engine attempt to go slower, theballs B B, by virtue of their inertia, will not instantly change their speed, and therefore the spring F will open in proportion to its sensitiveness or elasticity, screwing the nut K up and raising the point A, and with it the valve or other attachment.

The advantages of this governor are, first, the avoidance of the diminution of sensitiveness at greatangles of, the arms R R, since the balls do not rise and are not affected by gravity, as is the case with the-ordinary centrifugal governor; second, the ability to make thepreliminary adjustment of theheight of the valve above its seat by means of the nut K and screw M; third, the use of centrifugal force and inertia in conjunction enable a very strong governor of very great sensitiveness, as the movement of the valve due to inertia is made by means of a screw-thread, M, of great power, handled by an extremely sensitive spring, F. By means of the lock-nuts N thetension of the spring E can be adjusted for different speeds without diminishing the sensitiveness of the governor, which is dependent on the tension of spring F. The arrangement shown in Fig. 2 is similar to that shown in Fig. 1, with the exception that the spindle G is threaded, instead of the nut K. The nut is recessed merely to hold upper arm, D, in place, while still permitting it to turn. In Fig. 3 the action is sub stantially the same, except that a thread, 0, preferably of very steep pitch, is cut on the spindle G and the nut K recessed to hold hub H of upper miter-gear, b, while still permitting it to turn. The inertia of the balls will tend to screw the spindle G down against the tension of spring E, which also resists the cen- IOO trifugal force of the balls. Fig. 4 is substantially the same as Fig. 1, except that the spindle G has a thread out upon it, and the nut K is recessed to hold hub H of upper miter-gear, b. The nut K can turn around hub H, and the spring F serves to resist the pull due to the combined action of the centrifugal force and.

inertia of the balls.

Fig. 5 is a plain centrifugal governor in which is introduced the hereinbefore-deseribcd parallel motion for the purpose of eliminating gravity.

Having thus described my invention, I

claim- Witnesses:

JOHN HosKIN, FREDERICK S. DIOKSON. 

